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RESEARCH PRODUCT

FA04.03: MIE VERSUS RAMIE: PROMISING RESULTS OF A SINGLE-CENTER AND SINGLE-SURGEON ANALYSIS

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Abstract Background Robot assisted surgery for esophageal cancer is rapidly increasing, especially high-volume centers with access to a robot. The fully robotic minimally invasive esophagectomy using 4 robotic arms in the abdomen and thorax (RAMIE4) is performed as standard procedure in our department. In this analysis we compare the results of our first 50 RAMIE4 procedures with our last 50 fully minimally-invasive esophagectomies (MIE), which was our standard prior the robotic era. Methods Between April 2016 and March 2018, the data from 100 consecutive patients with esophageal carcinoma undergoing modified Ivor-Lewis esophagectomy, performed by the same surgeon using the identical intrathoracic anastomotic reconstruction technique (circular stapler). 50 patients were treated with MIE and the other 50 with RAMIE4. Demographic data, extracted lymph nodes and R-status were compared. Complications occurred were compered according to the Dindo-Clavien classification. Results Demographic data did not show significant differences between the groups. The overall 30- and 90- mortality rates were 1% (1/100) and 3% (3/100) respectively (P = 0.305 and P = 0.499 respectively). In the RAMIE group the median lymph node harvest was significantly higher (27 vs. 23; P = 0.045), the median hospital stay was less in the RAMIE group, however not significantly (11.5d vs 13d; P = 0.112), the median ICU stay was significantly lower in the RAMIE group compared to MIE (1d vs 2.5d; P = 0.002). The complications according to the Dindo-Calvien classification were not significantly different between the two groups (P = 0.091). Conclusion In this study we were able to demonstrate the superiority of robotic assisted lymph node dissection for esophageal cancer surgery in a highly comparable setting. In addition the perioperative parameters, especially ICU stay seem to be in favor of RAMIE. The future potential of standardized RAMIE and RAMIE4 seems to be high. Disclosure All authors have declared no conflicts of interest.